Unlike "dumb" irons, the ZD-95GF uses active feedback.
Trace the voltage from the DC jack through the regulator to ensure the MCU is receiving its 5V rail. Maintenance Tips for Portable Stations zd95gf schematic portable
A streamlined PCB layout makes it ideal for field repairs. Core Components of the ZD-95GF Schematic Unlike "dumb" irons, the ZD-95GF uses active feedback